CURT 51521 User manual

51521
CURT
Brand
CURT
Model
51521
Type
User manual

CURT 51521 is a brake control tester designed to assist in the installation and testing of brake controls for trailers or recreational vehicles. It enables you to:

  • Connect the brake control to the tester and a power source.
  • Set the output voltage adjustment and sync/sensitivity of the brake control.
  • Activate the brake pedal and manual control lever to check brake output voltage and brake lamp activation.
  • Test for short circuit/overload protection and disconnect notification features of the brake control.
  • Verify proper brake control function at varying output levels.

CURT 51521 is a brake control tester designed to assist in the installation and testing of brake controls for trailers or recreational vehicles. It enables you to:

  • Connect the brake control to the tester and a power source.
  • Set the output voltage adjustment and sync/sensitivity of the brake control.
  • Activate the brake pedal and manual control lever to check brake output voltage and brake lamp activation.
  • Test for short circuit/overload protection and disconnect notification features of the brake control.
  • Verify proper brake control function at varying output levels.
OPERATING INSTRUCTIONS
OPERATION
Scan for helpful
installation tips
Step 1
Connect the brake control tester to the brake control.
Step 2
Plug the brake control test box power cord
into a 120-volt AC wall outlet.
Step 3
Put the brake control on a level surface. Turn the brake
control tester on by pressing the red power button.
The button will light up when power is on.
Step 4
If equipped, set the brake control's sync / sensitivity
adjustment to its maximum setting.
Step 5
Set the output voltage adjustment of the brake control
to half of the displayed bars or 5.0, approximately 50%.
Step 6
Use the brake control's manual control lever to activate the
brake control. The output voltage of the brake control will
be displayed on the brake control tester's output display.
The output display should read approximately 6 volts at
50% output and 12 volts at 100% output, etc. Test at different
output levels to confirm proper function of the brake control.
The red brake lamp on the brake control tester will light if the
brake control has a brake light activation feature that is enabled.
If the brake control does not activate, or a disconnected
notification is displayed on the brake control, check to make
sure the black disconnect button on the tester is not activated.
Step 7
Test the brake pedal activation of the brake control by pressing
the red brake button on the brake control tester. The output
display will register a voltage corresponding to the brake output
settings of the brake control and the red brake lamp will light.
Step 8
Test the short circuit / overload protection of the brake control
by holding the brake control's manual control lever on and
activating the amber short button on the tester. The brake
control should indicate a short circuit / overload condition
as outlined in its installation and user guide.
Step 9
Test the disconnect notification of the brake control by
applying the brake control's manual control lever and
pressing the black disconnect button on the tester. The
brake control should indicate a disconnect condition as
outlined in its installation and user guide.
Note:
Some brake controls, like CURT's Reflex and TriFlex,
use dual-axis or triple-axis motion sensing to provide highly
responsive and smooth stops. For these accelerometer-
based brake controls, the output voltage is proportional to
the brake control's set limits based on data input sensed
while stopping. If the tow vehicle is parked or stopped with
the brakes applied, brake control output to the trailer brakes
will be minimal as no stopping forces will be sensed by the
brake control.
BRAKE CONTROL TESTER
PAGE 1 • 51521-INS-RA • 1.877.287.8634 • NEED ASSISTANCE? • CURTMFG.COM
  • Page 1 1

CURT 51521 User manual

51521
CURT
Brand
CURT
Model
51521
Type
User manual

CURT 51521 is a brake control tester designed to assist in the installation and testing of brake controls for trailers or recreational vehicles. It enables you to:

  • Connect the brake control to the tester and a power source.
  • Set the output voltage adjustment and sync/sensitivity of the brake control.
  • Activate the brake pedal and manual control lever to check brake output voltage and brake lamp activation.
  • Test for short circuit/overload protection and disconnect notification features of the brake control.
  • Verify proper brake control function at varying output levels.
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